I am trying to run a data server behind nginx by using a reverse proxy. My problem is that the host name received by my application contains the port of the proxied server not the port of the initial request i.e. a request to http://myserver/dataserver is forwarded to /dataserver:30084 but my appliaction gets myserver:30084 instead of myserver. It is a requirement that I know the port of the original request so as to be able to operate on a port other than 80. As it stands I am having to programatically remove the port.

This is part of my nginx.conf:

server {
listen 80;
server_name localhost;

location / {
root html;
index example.html example.htm;
}

location /dataserver {
proxy_pass http://localhost:30084/dataserver;
proxy_set_header Host $host;
}

Any help would be appreciated.